Get index by id

gistfile1.txt

const id = 42;

const myArray = [
  {
    id: 1,
    name: 'foobar',
  },
  {
    id: 7,
    name: 'lucky',
  },
  {
    id: 42,
    name: 'the answer',
  }
];

const index = myArray.map(item => item.id).indexOf(id);

// index = 2;